Samuel Thibault 2b09d5d364 fbcon: Check font dimension limits ...

blit_x and blit_y are u32, so fbcon currently cannot support fonts
larger than 32x32.

The 32x32 case also needs shifting an unsigned int, to properly set bit
31, otherwise we get "UBSAN: shift-out-of-bounds in fbcon_set_font",
as reported on:

http://lore.kernel.org/all/IA1PR07MB98308653E259A6F2CE94A4AFABCE9@IA1PR07MB9830.namprd07.prod.outlook.com
Kernel Branch: 6.2.0-rc5-next-20230124
Kernel config: https://drive.google.com/file/d/1F-LszDAizEEH0ZX0HcSR06v5q8FPl2Uv/view?usp=sharing
Reproducer: https://drive.google.com/file/d/1mP1jcLBY7vWCNM60OMf-ogw-urQRjNrm/view?usp=sharing

Reported-by: Sanan Hasanov <sanan.hasanov@Knights.ucf.edu>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Fixes: 2d2699d984 ("fbcon: font setting should check limitation of driver")
Cc: stable@vger.kernel.org
Tested-by: Miko Larsson <mikoxyzzz@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Helge Deller <deller@gmx.de>

2023-02-04 14:29:19 +01:00

..

bitblit.c

Revert "fbdev: Garbage collect fbdev scrolling acceleration, part 1 (from TODO list)"

2022-02-02 15:14:56 +01:00

cfbcopyarea.c

…

cfbfillrect.c

…

cfbimgblt.c

fbdev: Fix cfb_imageblit() for arbitrary image widths

2022-03-25 09:55:54 +10:00

fb_cmdline.c

…

fb_ddc.c

…

fb_defio.c

Revert "drm/fb-helper: Schedule deferred-I/O worker after writing to framebuffer"

2022-11-23 09:11:00 +01:00

fb_draw.h

…

fb_notify.c

video: fbdev: core: Fix kernel-doc warnings in fbmon + fb_notify

2020-12-08 18:31:56 +01:00

fb_sys_fops.c

…

fbcmap.c

fbdev: zero-fill colormap in fbcmap.c

2021-04-10 11:12:08 +02:00

fbcon_ccw.c

fbcon: Add option to enable legacy hardware acceleration

2022-02-02 15:16:26 +01:00

fbcon_cw.c

fbcon: Add option to enable legacy hardware acceleration

2022-02-02 15:16:26 +01:00

fbcon_rotate.c

fbcon: Drop EXPORT_SYMBOL

2020-11-17 11:00:43 +01:00

fbcon_rotate.h

fbcon: Add option to enable legacy hardware acceleration

2022-02-02 15:16:26 +01:00

fbcon_ud.c

fbcon: Add option to enable legacy hardware acceleration

2022-02-02 15:16:26 +01:00

fbcon.c

fbcon: Check font dimension limits

2023-02-04 14:29:19 +01:00

fbcon.h

fbcon: Replace FBCON_FLAGS_INIT with a boolean

2022-04-07 16:52:13 +02:00

fbcvt.c

video: fbdev: fbcvt.c: fix printing in fb_cvt_print_name()

2022-01-30 21:19:22 +01:00

fbmem.c

fbdev: Add support for the nomodeset kernel parameter

2022-11-16 13:26:25 +01:00

fbmon.c

fbdev: fbmon: fix function name in kernel-doc

2023-01-16 09:37:31 +01:00

fbsysfs.c

fbdev: fbcon: Destroy mutex on freeing struct fb_info

2022-08-24 21:47:08 +02:00

Makefile

…

modedb.c

…

softcursor.c

fbcon: Drop EXPORT_SYMBOL

2020-11-17 11:00:43 +01:00

svgalib.c

…

syscopyarea.c

…

sysfillrect.c

fbdev: Improve performance of sys_fillrect()

2022-03-02 20:20:34 +01:00

sysimgblt.c

fbdev: Fix sys_imageblit() for arbitrary image widths

2022-03-25 09:55:52 +10:00

tileblit.c

Revert "fbdev: Garbage collect fbdev scrolling acceleration, part 1 (from TODO list)"

2022-02-02 15:14:56 +01:00